CN104604160B

CN104604160B - Method and apparatus for sending and receiving data

Info

Publication number: CN104604160B
Application number: CN201380046790.0A
Authority: CN
Inventors: 金奉会; 徐东延; 黄大成; 安俊基
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2012-09-09
Filing date: 2013-09-04
Publication date: 2018-10-30
Anticipated expiration: 2033-09-04
Also published as: US9520979B2; US10205577B2; CN104620517A; EP2894797A4; EP2894797A1; US20150200762A1; EP2894798B1; CN104604160A; WO2014038849A1; US9634816B2; WO2014038852A1; EP2894798A1; EP2894797B1; EP2894798A4; CN104620517B; US20170187506A1; US20150200761A1

Abstract

Disclose a kind of method and apparatus for sending and receiving data.The method for sending uplink includes step：Terminal determines the size of ACK/NACK payload according to the transmission mode of first service cell and the transmission mode of second service cell；Size of the terminal based on the ACK/NACK payload establishes the transmission power for sending ACK/NACK payload；And the terminal is based on the transmission power and sends the ACK/NACK payload by physical uplink control channel PUCCH.

Description

Method and apparatus for sending and receiving data

Technical field

The present invention relates to wireless communications, more particularly, are related to a kind of method and apparatus for sending and receiving data.

Background technology

LTE (long term evolution) based on 3GPP (the 3rd generation partner program) TS (technical specification) released version 8 is crucial Next generation communication standard.

Such as 3GPP TS 36.211V8.7.0 (2009-05) " Evolved Universal Terrestrial Radio Access(E-UTRA)；Described in Physical Channels and Modulation (Release 8) ", in LTE system Physical channel can be divided into such as PDSCH (physical down link sharing channel) and PDCCH (physical downlink control channel) Downlink channel and such as PUSCH (physical uplink shared channel) and PUCCH (physical uplink link control letter Road) uplink channel.

It includes HARQ (hybrid automatic repeat-request) that PUCCH, which is for transmission, ack/nack signal, (channel quality refers to CQI Show symbol) or SR (scheduling request) uplink control information uplink control channel.

In addition, developing the 3GPP LTE-A (advanced) of the evolution version as 3GPP LTE.3GPP lte-a systems Using the carrier wave polymerization and MIMO (multiple-input, multiple-output) for supporting four or more antenna ports.

Carrier wave polymerization uses multiple component carriers.Each component carrier is limited using centre frequency and bandwidth.Under one Line link component carrier or a pair of of uplink component carrier and downlink component carrier correspond to a cell.If UE It is received and is serviced using multiple downlink CC, then the UE is referred to alternatively as receiving from multiple serving cells and service.

TDD (time division duplex) system uses identical frequency for downlink and uplink.Therefore, UL subframe Frame is associated with one or more downlink subframes.Term " association " mean transmission/reception in downlink subframe with it is upper Transmission/reception association in uplink subframe.For example, when receiving the transmission block in multiple subframes, UE with it is the multiple The HARQ or ACK/NACK to the transmission block are sent in the associated uplink subframe of downlink subframe.

Invention content

Technical problem

It is an object of the present invention to provide a kind of methods of transmission data.

It is a further object of the present invention to provide a kind of equipment of transmission data.

Technical solution

In order to realize the above-mentioned purpose of the present invention, according to an aspect of the present invention, a kind of method of uplink transmission can wrap It includes：ACK/ is determined according to the transmission mode of first service cell and the transmission mode of second service cell by user equipment (UE) The size of NACK payload；It is configured to send ACK/NACK by sizes of the UE based on the ACK/NACK payload The transmission power of payload；And physical uplink control channel is passed through based on the transmission power by the UE (PUCCH) the ACK/NACK payload is sent.

In order to realize the above-mentioned purpose of the present invention, according to an aspect of the present invention, the user in a kind of wireless communication system Equipment (UE) may include the processing for receiving radio frequency (RF) unit of radio signal and selectively being connect with the RF units Device, wherein the processor is implemented as the transmission mode of the transmission mode and second service cell according to first service cell The size for determining ACK/NACK payload, the size based on the ACK/NACK payload are configured to send ACK/NACK The transmission power of payload, and institute is sent by physical uplink control channel (PUCCH) based on the transmission power State ACK/NACK payload.

Technique effect

Transmission power data transmission efficiency can increase.

Description of the drawings

Fig. 1 shows the structure of LTE radio frames.

Fig. 2 shows the exemplary resources grids of downlink time slots.

Fig. 3 shows the structure of downlink subframe.

Fig. 4 shows the structure of 3GPP LTE tdd mode downlink radio frames.

Fig. 5 shows the structure of 3GPP LTE uplink subframes.

Fig. 6 shows the PUCCH format 1b under the normal CP of 3GPP LTE.

Fig. 7 shows to execute the example of HARQ.

Fig. 8 shows the PUCCH format based on block spread spectrum (block spreading).

Fig. 9 shows exemplary multicarrier.

Figure 10 shows the example of the error correction using DAI.

Figure 11 is the diagram for the example arrangement for showing the PUCCH format 3 under normal CP.

Figure 12 shows exemplary 3GPP LTE SPS.

Figure 13 is the exemplary diagram for showing monitoring PDCCH.

Figure 14 shows the 3GPP LTE downlink subframes assigned using reference signal and control channel.

Figure 15 shows the illustrative sub-frame with EPDCCH.

Figure 16 is the concept map for showing P cells and S cells.

Figure 17 is the concept map for showing the method that ACK/NACK is sent by UE according to the embodiment of the present invention.

Figure 18 is the concept map for showing the method that ACK/NACK is sent by UE according to the embodiment of the present invention.

Figure 19 is the concept map for showing the method that ACK/NACK is sent by UE according to the embodiment of the present invention.

Figure 20 is the concept map for showing ACK/NACK bits according to the embodiment of the present invention.

Figure 21 is the concept map for showing CSI feedback method according to the embodiment of the present invention.

Figure 22 is the concept map for showing aperiodicity CSI feedback method according to the embodiment of the present invention.

Figure 23 is the concept map for showing aperiodicity CSI feedback method according to the embodiment of the present invention.

Figure 24 is the concept map for showing the Poewr control method carried out by UE according to the embodiment of the present invention.

Figure 25 is the concept map for showing the Poewr control method carried out by UE according to the embodiment of the present invention.

Figure 26 is the concept map for showing the Poewr control method carried out by UE according to the embodiment of the present invention.

Figure 27 is the block diagram for showing wireless communication system according to the embodiment of the present invention.

Specific implementation mode

User equipment (UE) can be fixed or move, and can be referred to as such as user equipment (UE), movement station (MS), mobile terminal (MT), user terminal (UT), subscriber station (SS), wireless device, personal digital assistant (PDA), wireless-modulated Another term of demodulator, hand-held device, terminal, wireless terminal etc..

Base station (BS) is typically the fixed station with UE communication, and can be referred to as such as evolution node B (eNB), base station transceiver Another term of system (BTS), access point etc..

Fig. 1 shows the structure of the radio frame in 3GPP LTE.

It can be found in 3GPP (the 3rd generation partner program) TS 36.211V8.2.0 (2008-03) " Technical Specification Group Radio Access Network；Evolved Universal Terrestrial Radio Access(E-UTRA)；The 5th section of Physical channels and modulation (Release 8) ".

Referring to Fig.1, radio frame includes 10 subframes 120, and a subframe includes two time slots 140.Radio frame can base It indexes (that is, from time slot #0 to #19), or can be indexed (that is, from subframe #0 to subframe # based on subframe 120 in time slot 140 9).For example, subframe #0 may include time slot #0 and time slot #1.

It sends 120 the time it takes of subframe and is known as transmission time interval (TTI).TTI can be data transmission Scheduled basis.For example, radio frame can can have 0.5ms's with the length of 10ms, subframe with the length of 1ms, time slot Length.

One time slot 140 includes multiple sub- loads in multiple orthogonal frequency division multiplexing (OFDM) symbol and frequency domain in time domain Wave.In LTE, BS uses OFDMA as cut-in method in downlink channel.OFDM symbol for indicating symbol period, And can according to Multiple Access scheme referred to as other titles.For example, sending the data to the uplink channel of BS in wireless device In, he Single Carrier-Frequency Division multiple access (SC-FDMA) can be used.It is referred to alternatively as by the symbolic component of uplink channel transmission data SC-FDMA symbols.

The structure of radio frame 100 described in Fig. 1 is the embodiment of frame structure.It therefore, can be by changing subframe The quantity of 120 quantity, the quantity for the time slot 140 being included in subframe 120 or the OFDM symbol being included in time slot 140 is come Limit new radio frame format.

The quantity of symbol in the radio frame structure, including in a slot can be according to which cyclic prefix (CP) be used And change.For example, when radio frame uses normal CP, a time slot may include seven OFDM symbols.When radio frame uses When extending CP, a time slot may include six OFDM symbols.

Wireless communication system can be divided into frequency division duplex (FDD) scheme and time division duplex (TDD) scheme.According to FDD schemes, on Uplink transmission and downlink transmission can be executed based on different frequency bands.According to TDD schemes, uplink transmission and downlink Link transmission can be executed using time division scheme based on identical frequency band.The channel response of TDD schemes be substantially it is mutual, because Identical frequency band is used for it.That is, in TDD schemes, downlink channel response and uplink channel responses are in given frequency It is almost identical in band.Therefore, the wireless communication system based on TDD can be obtained from the channel state information of uplink channel Channel state information.In TDD schemes, for uplink and downlink transmission by the entire frequency band time-division, therefore under BS Uplink transmission and the transmission of the uplink of wireless device can not be performed simultaneously.

Fig. 2 is the exemplary diagram for the resource grid for showing downlink time slots.

Downlink time slots include multiple OFDM symbols in time domain, and include NRB resource block in frequency domain.As The NRB of the quantity of resource block in downlink time slots is determined according to the downlink transmission bandwidth configured at cell.Example Such as, in LTE system, according to the transmission bandwidth used, NRB can be 6 to 110 value.Resource block 200 may include in frequency domain Multiple subcarriers.Uplink time slot can have structure identical with downlink time slots.

Each element on resource grid is referred to as resource element 200.Resource element 220 on resource grid can pass through rope Draw and (k, l) is identified.Here, k (k=0 ..., NRBx12-1) is the index of the subcarrier in frequency domain, l (l=0 ..., 6) It is the index of the OFDM symbol in time domain.

Here, a resource block 200 may include 7 OFDM symbols in time domain, and may include in frequency domain by 12 7 × 12 resource elements 220 of subcarrier composition.Such size is only example, constitute a resource block 200 subcarrier and The quantity of OFDM symbol can change.Resource block is to the resource unit that instruction includes two resource blocks.

Quantity including OFDM symbol in one time slot can change as described above according to CP.In addition, being included in one The quantity of resource block in a time slot can change according to the size of entire frequency bandwidth.

Fig. 3 is the diagram for the structure for showing downlink subframe.

Downlink subframe can be identified based on the time by two time slots 310,320.Each time slot 310 or 320 is normal CP includes 7 OFDM symbols.In first time slot with arrive first 3 OFDM symbols (for 1.4MHz bandwidth, most 4 OFDM symbol) corresponding resource area can be used as control area 350.Remaining OFDM symbol can be used as being assigned with such as physical down The data area 360 of the Traffic Channel of link shared channels (PDSCH).

For example, PDCCH can be control channel, for sending about the resource in downlink sharied signal channel (DL-SCH) Distribution and send the information of format, uplink shared channel (UL-SCH) resource allocation, about the paging on PCH information, Information about the system on DL-SCH and the money about the top level control message (for example, random access response) through PDSCH Information, the transmission power control command set and voice over internet protocol (VoIP) to each UE in random UE groups of source distribution Activation.Multiple units for sending PDCCH data can be limited in control area 350.UE can be monitored for sending PDCCH numbers According to multiple units to obtain control data.For example, the polymerization of one or more continuous control channel elements (CCE) can be based on PDCCH data are sent to UE.CCE can be for sending PDCCH data unit.CCE may include multiple resource elements Plain group.Resource element groups are the resource units for including available 4 resource elements.

Base station determines PDCCH formats based on down link control information (DCI), and cyclic redundancy check (CRC) is attached It is connected to control information.It is right using unique identifier (being referred to as radio network temporary identifier (RNTI)) according to the owner or purposes CRC carries out mask.If PDCCH is used for particular UE, the unique identifier (for example, C-RNTI (cell-RNTI)) of UE can quilt It is masked to CRC.If PDCCH is used for paging message, it indicates that the identifier (for example, P-RNTI (paging-RNTI)) of paging can It is masked to CRC.If PDCCH is used for system information block (SIB), system information RNTI (SI-RNTI) can be masked to CRC.In order to indicate that response of the random access response as the random access lead code to UE, random access-RNTI can be by masks To CRC.

Fig. 4 shows the downlink radio frame structure under tdd mode.

For the downlink radio frame structure under tdd mode, reference can be made to 3GPP TS 36.211V8.7.0 (2009- 05)"Evolved Universal Terrestrial Radio Access(E-UTRA)；Physical Channels and The chapters and sections 4 of Modulation (Release 8) ", the downlink radio frame structure under tdd mode and time division duplex (TDD) It is related.

With index #1 and index #6 subframe be known as special subframe, and include down link pilot timeslot (DwPTS), Protection period (GP) and uplink pilot time slot (UpPTS).DwPTS is used for search of initial zone, synchronization or channel in UE Estimation.The channel estimation that UpPTS is used in BS is synchronous with the transmission of the uplink of UE.GP be for removing due to uplink and The multidiameter of down link signal between downlink and the period of interference occurred in the uplink.

In TDD, downlink (DL) subframe and uplink (UL) subframe coexist in a radio frame.Table 1 shows Go out the example of the configuration of radio frame.

" D " indicates that DL subframe, " U " indicate that UL subframe, " S " indicate special subframe.When receiving UL-DL configurations from BS, UE It can know that specific sub-frame is DL subframe or UL subframe according to the configuration of radio frame.

The PCFICH sent in the first OFDM symbol of subframe is used for control channel transmission in carrying about subframe The control format indicator (CFI) of the quantity (that is, size of control area) of OFDM symbol.UE is received on PCFICH first CFI then monitors PDCCH.

Fig. 5 is the diagram for the structure for showing the uplink subframe in 3GPP LTE.

Uplink subframe, which can be divided into, distributes to physical uplink control channel (PUCCH) for transmitting uplink control The control area of information processed and physical uplink shared channel (PUSCH) is distributed to for transmitting the data field of user data Domain.PUCCH resource for distribution can be located at the edge of the bandwidth of component carrier (CC).

It can be based on RB in subframe to distributing PUCCH.With RB to corresponding RB can be individually allocated to the first time slot and Different subcarriers in second time slot.M is the position for indicating to distribute to the position of RB pairs of the logic frequency domain of PUCCH in subframe Index.The RB of m values having the same is assigned to the different subcarriers of the first time slot and the second time slot.

There can be various formats according to 3GPP TS 36.211V8.7.0, PUCCH.It can be according to the tune for PUCCH format Scheme processed has the different PUCCH formats of different bit numbers to use in subframe.

Table 2 shows the example of every the subframe bit number and modulation scheme according to PUCCH format.

Table 2

PUCCH format	Modulation scheme	Bit number per subframe
			1	N/A	N/A
1a	BPSK	1
			1b	QPSK	2
2	QPSK	20
			2a	QPSK+BPSK	21
2b	QPSK+BPSK	22
			3	QPSK	48

Use the PUCCH format 1 transmitted for scheduling request (SR), ack/nack signal for sending HARQ PUCCH format 1a/1b, for the PUCCH format 2 of CQI transmission and for transmitting while CQI and ack/nack signal PUCCH format 2a/2b.When only sending ack/nack signal in subframe, using PUCCH format 1a/1b, when only sending SR When, use PUCCH format 1.When sending SR and ack/nack signal simultaneously, using PUCCH format 1, and ACK/NACK believes It number is sent after being modulated onto the resource for distributing to SR.

Whole PUCCH formats use the cyclic shift (CS) of the sequence of each OFDM symbol.Basic sequence is by cyclic shift Specific CS amounts, to generate cyclically shifted sequences.The specific CS amounts are indicated by CS indexes.

Sequence length is equal to the quantity for including element in the sequence.The sequence index of indicator sequence can be based on cell ID Symbol, timeslot number in radio frame etc. determine.Assuming that basic sequence is mapped to a resource block in frequency domain, then one provides Source block includes 12 subcarriers, therefore the length of basic sequence N is 12.It can be by the way that basic sequence cyclic shift be generated cycle Shift sequence.

The intervals CS can be based on to export to basic sequence available cyclic shift index from basic sequence.For example, working as basic sequence When row length is divided into 2 between 12 and CS, the sum to basic sequence available cyclic shift index is 6.Hereinafter, will description HARQ ack/nack signals transmission under PUCCH format 1b.

Fig. 6 shows the normal CP PUCCH formats 1b in 3GPP LTE.

One time slot includes seven OFDM symbols, wherein three are RS OFDM symbols for reference signal, four additional It is the OFDM data symbol for ack/nack signal.

In PUCCH format 1b, the dibit ack/nack signal of coding is modulated by QPSK (quadrature phase shift keying), with life At the symbol d (0) of modulation.

Cyclic shift indexes I_csIt can be according to the timeslot number (n in radio frame_s) and/or notation index in time slot and become Change.

In normal CP, a time slot includes four OFDM symbols of the transmission for ack/nack signal.Thus, it is supposed that Correspondence cyclic shift index in each OFDM data symbol is I_CS0、I_CS1、I_CS2、I_CS3。

The symbol d (0) of modulation is spread to cyclically shifted sequences r (n, I_cs).Assuming that being accorded with (i+1) OFDM in time slot Number corresponding one-dimensional frequency expansion sequence is m (i), it is represented by { m (0), m (1), m (2), m (3) }={ d (0) r (n, I_cs0),d (0)r(n,I_cs1),d(0)r(n,I_cs2),d(0)r(n,I_cs3)}。

For the increased ability of UE, one-dimensional frequency expansion sequence is spread using orthogonal sequence.As with spread spectrum The orthogonal sequence of the factor (K)=4, w_i(k) (i is sequence index, 0≤k≤K-1), uses following sequence.

[table 3]

Index	[w_i(0),w_i(1),w_i(2),w_i(3)]
		0	[+1 +1 +1 +1]
1	[+1 -1 +1 -1]
		2	[+1 -1 -1 +1]

As the orthogonal sequence with spreading factor (K)=3, w_i(k) (i is sequence index, 0≤k≤K-1) uses following Sequence.

[table 4]

Index	[w_i(0),w_i(1),w_i(2)]
		0	[1 1 1]
1	[1 e^j2π/3 e^j4π/3]
		2	[1 e^j4π/3 e^j2π/3]

Different spread spectrum coefficients can be used for each time slot.

Therefore, it gives any orthogonal sequence and indexes i, two-dimensional spread-spectrum sequence { s (0), s (1), s (2), s (3) } can indicate such as Under：

{ s (0), s (1), s (2), s (3) }={ w_i(0)m(0),w_i(1)m(1),w_i(2)m(2),w_i(3)m(3)}

Two-dimensional spread-spectrum sequence { s (0), s (1), s (2), s (3) } is subjected to IFFT (inverse fast fourier transform), then at it It is sent in corresponding OFDM symbol.By this method, ack/nack signal can be sent on PUCCH.

Then transmission for PUCCH format 1b reference signals, reference sequences r (n) utilize orthogonal sequence by cyclic shift Spread spectrum.Assuming that cyclic shift index corresponding with three RS OFDM symbols is I_cs4,I_cs5,I_cs6, then three cyclic shifts can be obtained Sequence r (n, I_cs4),r(n,I_cs5),r(n,I_cs6).The sequence of these three cyclic shifts utilizes the orthogonal sequence of K=3 It is spread.

Orthogonal sequence indexes i, cyclic shift indexes I_csIt is the parameter for configuring PUCCH with resource block index m, and is Distinguish the resource of PUCCH (or UE).Assuming that the quantity of available cycles displacement is 12 and the quantity of available orthogonal sequence index is 3, then in single resource block reusable 36 UE in total PUCCH.

In 3GPP LTE, UE available resources indexExport (for example) constitutes the above-mentioned orthogonal sequence rope of PUCCH Draw i or cyclic shift index I_cs.The resource index can be defined as formulan_CCEIt is for its correspondence The number of first CCE of the transmission of DCI is (that is, the downlink of the reception for down link data corresponding with ack/nack signal Link circuit resource distributes),It is the parameter for being supplied to UE by higher layer message by base station.

Time, frequency or the code resource of transmission for ack/nack signal are referred to as ACK/NACK resources or PUCCH is provided Source.As described above, the index for sending the ACK/NACK resources needed for ack/nack signal on PUCCH (is referred to as ACK/NACK moneys Source indexes or PUCCH indexes) it may be expressed as orthogonal sequence index i, cyclic shift index I_cs, resource block index m and is used for Obtain at least one of the index of these three indexes.

Fig. 7 shows to execute the example of HARQ.

It includes that the DL of DL resource allocations permits that UE, which is monitored and received on PDCCH and PDCCH 701 in the n-th DL subframe,. UE receives DL transmission blocks by the PDSCH 702 indicated by DL resource allocations.

The DL transmission blocks on PUCCH 711 that ACK/NACK responses are sent in the n-th+4UL subframes by UE.The ACK/NACK Response can be the confirmation of the reception of DL transmission blocks.

If DL transmission blocks are successfully decoded, ack/nack signal can be ack signal, or if DL transmission blocks Decoding failure, then can be NACK signal.Base station can perform the transmission again of DL transmission blocks, directly when receiving NACK signal Until base station receives ack signal or until transmission reaches the maximum counting of transmission again.

In 3GPP LTE, UE configures the resource index of PUCCH 711 using the resource allocation of PDCCH 701.That is, The minimum CCE indexes (or index of the first CCE) of transmission for PDCCH 701 are n_CCE, and resource index is confirmed as

Multicarrier system will now be described.

3GPP LTE systems support downlink bandwidth to be different from the configuration of uplink bandwidth, however, the configuration is adopted Take single component carrier.3GPP LTE systems can be supported to be up to 20MHz, and the bandwidth between uplink and downlink Difference, the system only support a CC for each in uplink and downlink.

Spectrum aggregating (or aggregated bandwidth or carrier wave polymerization) supports multiple CC.For example, respectively having the carrier band of 20MHz The distribution of five CC of wide granularity will support the bandwidth for being up to 100MHz.

One DL CC (or a pair of of downlink CC and uplink CC) can correspond to a cell.Therefore, by more A DL CC and the UE of base station communication are referred to alternatively as being serviced by multiple serving cells.

Lte-a system wishes to send for by multiple DL (downlinks by specific UL (uplink) CC (component carrier) Link) CC (component carrier) send multiple PDSCH multiple ACK/NACK information/signals.For this purpose, a design is and utilization The existing LTE system that PUCCH format 1a/1b sends ACK/NACK is different, and executing channel to multiple ACK/NACK information/signal compiles Code (for example, Reed-Muller coding or tailed-off convolutional code) and using new PUCCH format (for example, E-PUCCH formats), Multiple ACK/NACK information/signals are sent based on the modification PUCCH format of following block spread spectrum or PUCCH format 2.It will now be described Completely new PUCCH format modification based on block spread spectrum.

Fig. 8 shows the PUCCH format spread based on block.

Use PUCCH format 1 or PUCCH format 2 different from existing LTE system, block spread spectrum is to send control information Shi Liyong SC-FDMA schemes carry out the scheme of modulation control information (for example, ACK/NACK).

With reference to Fig. 8, symbol sebolic addressing can be spread by OCC (orthogonal superposition code) in the time domain, then can be sent.It is available OCC is by the control signal multiplexing from multiple UE in identical RB.In existing PUCCH format 2, a symbol is sent through time domain Sequence, and realize the multiplexing on UE using the cyclic shift of CAZAC sequences.However, in the E-PUCCH spread based on block In, a symbol sebolic addressing is sent through frequency domain, and the multiplexing on UE is executed using the time domain spread spectrum based on OCC.

Fig. 8 shows that a symbol sebolic addressing is generated as five SC-FDMA symbols then quilt by the OCC of length -5 (SF=5) The example of transmission.Although in fig. 8 during a time slot using two R/S symbols in total, can be used three R/S symbols or The OCC of person SF=4, or it is contemplated that various other applications.Here, it can be given birth to by the CAZAC sequences with particular cyclic shift At R/S symbol, and specific OCC can be utilized to send, using (multiplexing) R/S symbol in the time domain.

PUCCH format 2 or E-PUCCH formats is utilized to send being compiled based on channel for multiple ACK/NACK for ease of description, The scheme of code is referred to as " more bit ACKs/NACK coding transmission schemes ".More bit ACKs/NACK coding can be used for sending by pair ACK/NACK or DTX information (meaning to fail reception/detection PDCCH) for the PDSCH of multiple DL CC carry out channel coding and The ACK/NACK encoding blocks of generation.

For example, if UE is operated under SU-MIMO patterns to receive two code words from downlink CC, UE is transmittable to close In the total of four feedback states (including ACK/ACK, ACK/NACK, NACK/ACK and NACK/NACK) for each code word Information or information about the total of five feedback states for further including DTX.If UE receives single code word, UE can have Information about the total of three feedback states including ACK, NACK and DTX.If handling NACK and DTX in an identical manner, Then UE can have the information about two feedback states in total including ACK and NACK/DTX.If UE polymerizations up to five Downlink CC and it is referred to as under SU-MIMO patterns on all CC, then UE can have can transmit feedback about maximum 55 The information of state.Indicate that the size of the ACK/NACK payload for the information that can transmit feedback states about 55 can be in total 12 Bit.If handling DTX and NACK in an identical manner, the quantity of feedback states is 45 so that ACK/NACK is effectively carried The size of lotus is 10 bits to indicate feedback states.

ACK/NACK multiplexings (for example, ACK/NACK is selected) method in existing LTE TDD systems substantially considers hidden Formula ACK/NACK selection schemes, using the implicit PUCCH resource of each UE corresponding with the scheduling PDCCH of PDSCH so as to true Protect the PUCCH resource of UE.For example, implicit ACK/NACK can be carried out using the implicit PUCCH resource with minimum CCE indexed links Selection.

In addition, LTE-A FDD systems fundamentally wish multiple in response to being sent by multiple downlink CC PDSCH transmits multiple ACK/NACK via the single specific uplink CC configured with UE ad hoc fashions.For this purpose, considering in this way ACK/NACK selection schemes, using being linked with specific one or some or all of PDCCH in schedule downlink CC Implicit PUCCH resource or previously passed RRC signaling be each UE reserve implicit PUCCH resource and explicit PUCCH resource Combination.For example, can be sent out using the implicit PUCCH for linking with minimum CCE indexes nCCE or being linked with nCCE and nCCE+1 Send ACK/NACK.

Fig. 9 shows exemplary multicarrier.

Three DL CC and three UL CC are shown, but the quantity of DL CC and UL CC are unrestricted.PDCCH and PDSCH It is independently sent on each DL CC, and PUCCH and PUSCH is independently sent on each UL CC.Due to defining three A DL CC-UL CC couple, so UE can be considered as by three serving cell services.

UE can monitor DL CC and PDCCH, and UE can receive DL transmission blocks by multiple DL CC.UE can pass through multiple UL CC sends multiple UL transmission blocks simultaneously.

Assuming that a pair of DL CC#1 and UL CC#1 are first service cells, a pair of of DL CC#2 and UL CC#2 are second services Cell, DL CC#3 are third serving cells.Each serving cell can be identified by its cell index (CI).CI is right for its It can be unique to answer cell, or can be that UE is specific.In this example, first CI=is assigned to third serving cell 0,1 and 2.

Serving cell can be divided into main plot and secondary cell.Main plot is that the initial of UE is operated and established under basic frequency to connect Connect the cell for either initiating the connection and rebuilding processing or being instructed to during hand-off process.Main plot is also referred to as reference cell. Each secondary cell can be operated under auxiliary frequency rate and can be configured after RRC connections have been established.Secondary cell can be used for providing additional Radio resource.At least one main plot is always configured, and secondary cell can be increased/modification/by high-level signaling and be discharged.It is each Secondary cell can be activated by main plot.

The CI of main plot can be fixed.For example, minimum CI can be designated as the CI of main plot.Hereinafter, in order to describe, it is main The CI of cell is 0, and the CI of secondary cell assigns 1 and subsequent number by sequence.

The ACK/NACK transmission of the HARQ under 3GPP LTE TDD (time division duplex) will now be described.

Different from FDD (frequency division duplex) at TDD, DL subframe and UL subframe coexist in a radio frame.In general, The quantity of UL subframe is less than the quantity of DL subframe.Therefore, TDD system in response to multiple DL transmission blocks by multiple ack/nack signals Transmission backup in a UL subframe, with to prepare when UL subframe deficiency for sending ack/nack signal.

According to 3GPP TS 36.213V8.7.0 (2009-05) the 10.1st chapter, two ACK/NACK patterns, channel choosing are initiated It selects and binds.

First, under binding pattern, when PDSCH (that is, downlink transmission block) of all receptions is successfully decoded, UE hairs ACK is sent, NACK is otherwise sent.This is referred to as and operates.

However, binding is not limited to and operates, but may include various other operations, for example, with multiple transmission blocks (or code word) The compression of corresponding ACK/NACK bits.For example, binding allows the quantity of the ACK (or NACK) of indication counter or continuous ACK Quantity.

Secondly, channel selection is also referred to as ACK/NACK multiplexings.UE selects one in multiple PUCCH resources to send ACK/NACK。

Under represent and configured according to UL-DL, with the associated DL subframe n-k of UL subframe n, wherein k ∈ K and M is set K Quantity.

[table 5]

M DL subframe of consideration is associated in UL subframe n and M=4.Since UE can receive four from four DL subframes PDCCH, so UE can get three PUCCH resourcesWhen b (0) and b (1) are to compile When the dibit ACK/NACK of code, the example of channel selection is as shown in the table.

[table 6]

HARQ-ACK (i) is the ACK/NACK to the i-th downlink subframe in M downlink subframe.DTX is (non- Continuously transmit) mean that UE can not receive DL transmission blocks on the PDSCH in DL subframe or can not detect corresponding PDCCH.

For example, when UE is properly received all four DL transmission blocks in four DL subframes, UE is utilizedTo bit (1,1) QPSK modulation is carried out, and ACK/NACK is sent in response using PUCCH format 1b.If UE fails the first (i =1) the DL transmission blocks decoding in DL subframe, successfully decodes other subframes, then UE is utilizedBit (0,1) is carried out QPSK is modulated, and utilizes PUCCH format 1b to send ACK/NACK in response.

The only transmittable dibit ACK/NACK of existing PUCCH format 1b.However, channel selection can be by that will distribute PUCCH resource fetches the information sent about more ACK/NACK states with practical ack/nack signal chain.This PUCCH format It can be described as the PUCCH format 1b with channel selection.

In addition, when M DL subframe is associated with UL subframe n, base may occur due to the DL subframe (or PDCCH) of loss The ACK/NACK mismatches stood between UE.

Assuming that M=4 and base station, which pass through four DL subframes, sends four DL transmission blocks.Due to what is lost in the second DL subframe PDCCH, UE may only receive the first, third and fourth transmission block, without receiving the second transmission block.In such case Under, if using binding, UE causes the mistake for sending ACK.

In order to solve this mistake, DAI (downlink assignment indexing) is included in the licenses of the DL on each PDCCH. DAI is assigned with the quantity of the accumulation PDCCH of PDSCH transmission.Dibit DAI values sequentially increase from the beginning, and from DAI =4, it can return to and calculated using mould 4.If M=5 and five DL subframe is all scheduled, DAI can according to DAI=1,2,3, 4 and 1 sequence is included in it and corresponds in PDCCH.

Consider that there is DL:UL=9:1 TDD configurations, the DAI values that mould 4 calculates can provide as follows：

- DAI=1, for the PDSCH of the first, the 5th or the 9th scheduling

- DAI=2, the PDSCH dispatched for second or the 6th

- DAI=3, the PDSCH dispatched for third or the 7th

- DAI=4, for the PDSCH of the 4th or the 8th scheduling

Figure 10 shows the example of the error detection using DAI.

On the top of Fig. 9, UE can not receive DAI=2 since the second DL subframe is lost.In this case, work as UE When receiving DAI=3, UE may know that DL subframe corresponding with DAI=2 is lost.

In the lower part of Fig. 9, UE can not receive DAI=3 since third DL subframe is lost.In this case, UE can It can not know that third DL subframe is lost.However, 3GPP LTE based on the first CCE in last received PDCCH by being configured PUCCH makes the base station to be able to know that the DL subframe of loss.In other words, UE is utilized based on DL subframe corresponding with DAI=2 The PUCCH resource of PDCCH resource sends ACK/NACK.Base station utilizes and the DL subframe of DAI=2 (rather than DL of DAI=3 Frame) corresponding PUCCH resource receives ACK/NACK, therefore base station may know that third DL subframe is lost.

In addition, also discussing PUCCH format 3 with for due to the use of multiple clothes other than existing 3GPP LTE PUCCH formats ACK/NACK bit deficiencies caused by business cell are prepared.

Figure 11 is the diagram for the example arrangement for showing normal CP PUCCH formats 3.

One time slot includes seven OFDM symbols, and l has OFDM symbol number 0 to 6 in a slot.Two symbols of l=1,5 Number it is the RS OFDM symbols for reference signal, other OFDM symbols are the OFDM data symbols for ack/nack signal.

The ack/nack signal of 48 bits of encoded is subjected to QPSK (quadrature phase shift keying) modulation to generate symbol sebolic addressing d={ d (0),d(1),...,d(23)}.D (n) (n=0,1 ..., 23) is the modulation symbol of complex value.Symbol sebolic addressing d can be modulation symbol Number set.Bit number or modulation scheme in ack/nack signal are only examples, without being limited thereto.

It includes the first time slot and the second time slot that one PUCCH, which uses a RB, a subframe,.Symbol sebolic addressing d={ d (0), d (1) ..., d (23) be divided into respectively with length 12 two sequences, that is, d1={ d (0) ..., d (11) } and d2={ d (12) ..., (23) d }, First ray d1 is sent in the first slot, and the second sequence d2 is sent in the second time slot.Fig. 5 shows Go out the example that First ray d1 is sent in the first slot.

Symbol sebolic addressing utilizes orthogonal sequence w_iSpread spectrum.Frequency expansion sequence corresponds to each OFDM symbol, and orthogonal sequence is used In being spread to symbol sebolic addressing through OFDM data symbol, mutually to be distinguished between PUCCH (or UE).

Orthogonal sequence has spread spectrum coefficient K=5 and includes five elements.Orthogonal sequence can be according under index i One in five orthogonal sequences shown in table 5.

[table 7]

Index i	[w_i(0),w_i(1),w_i(2),w_i(3),w_i(4)]
		0	[1 1 1 1 1]
1	[1 e^j2π/5 e^j4π/5 e^j6π/5 e^j8π/5]
		2	[1 e^j4π/5 e^j8π/5 e^j2π/5 e^j6π/5]
3	[1 e^j6π/5 e^j2π/5 e^j8π/5 e^j4π/5]
		4	[1 e^j8π/5 e^j6π/5 e^j4π/5 e^j2π/5]

Different orthogonal sequences can be used to index for two time slots in subframe.

Each spread spectrum symbol sequence is according to cell particular cyclic shift valueCarry out cyclic shift.Each cyclic shift Symbol sebolic addressing be mapped to its corresponding OFDM data symbol and sent.

It is the specific ginseng of cell determined by the pseudo-random sequence initialized based on PCI (Physical Cell Identifier) Number.According to the timeslot number n in radio frame_sAnd OFDM symbol number l in time slot and change.

Two RS OFDM symbols quilt with the mapping of the reference signal sequence of the demodulation for ack/nack signal It sends.

As described above, ack/nack signal is spread using the orthogonal sequence with spread spectrum coefficient K=5, thus it is available Different orthogonal sequence indexes make up to five UE be distinguished from each other.This means that up to five PUCCH format 3's can be answered In identical RB.

The resource index of PUCCH format 1a/1b is obtained from last received PDCCH resource.The resource rope of PUCCH format 3 Draw and is indicated by ARI (ACK/NACK resource indicators).

First, base station informs that the more a candidate resources of UE index using the higher layer message of such as RRC information.Base station passes through DL licenses on PDCCH inform that UE indexes the resource index selected in the middle in multiple candidate resources.Selection is indicated in DL licenses The field of resource index be known as ARI.

For example, base station informs that tetra- candidate resources of UE index by RRC information.The ARI dispatched on the PDCCH of PDSCH refers to Show one in this four candidate resource indexes, PUCCH format 3 is configured from the resource index of selection.

DL permission bits number increases in order to prevent, and ARI is sent using existing DCI TPC (transmission power order).

SPS (semi-persistent scheduling) will now be described.

In general, UE permits from PDCCH reception DL first, is then received from base station and sent out by the indicated PDSCH of DL licenses The transmission block sent.This means that each transmission block is monitored with PDCCH, this is known as dynamic dispatching.SPS is limited in advance PDSCH resources, and UE receives transmission block by pre-qualified resource, is monitored without PDCCH.

Figure 12 shows the exemplary SPS in 3GPP LTE.

Figure 12 shows DL SPS, but it is equally applicable to UL SPS.

First, SPS configurations are sent to UE by base station by RRC (radio resource control) message.SPS configurations include SPS- C-RNTI the and SPS periods.Here, the SPS periods are assumed to be four subframes.

Although being configured with SPS, SPS is not performed immediately.UE can be monitored to have and be covered using SPS-C-RNTI The PDCCH 1201 of the CRC of code, to determine whether SPS is activated, then UE can be based on SPS and receive down link data.When When the NDI that DCI on PDCCH 1201 includes is 0, it is included in multiple fields in DCI (for example, TPC (order by transmission power Enable), the CS (cyclic shift) of DM-RS (demodulated reference signal), MCS (modulation and encoding scheme), RV (redundancy versions), HARQ into Journey number or resource allocation)) combination can be to determine whether SPS is activated or deactivated basis.This is further detailed below Thin description.

If SPS is activated, even if can not be received in the SPS periods if receiving DL on PDCCH and permitting UE Transmission block on PDSCH.The PDSCH received in the case of no PDCCH is known as SPS PDSCH.

Then, UE monitorings have the PDCCH 1202 using the CRC of SPS-C-RNTI progress masks to identify deactivating for SPS It is living.

According to 3GPP LTE, indicates that the PDCCH of the activation of SPS does not need ACK/NACK responses, but indicate deactivating for SPS PDCCH living needs ACK/NACK to respond.Hereinafter, DL transmission blocks may include the deactivated PDCCH for indicating SPS.

According to existing PUCCH format 1a/1b, resource index n is obtained from PDCCH⁽¹⁾ _PUCCH.However, being dispatched according to SPS, do not have Receive with the associated PDCCH of PDSCH, therefore use pre-assigned resource index.

For SPS, base station is informed multiple candidate resources index to UE by RRC information.Base station is by activating SPS's PDCCH 1201 (hereinafter, " SPS PDCCH ") notifies used resource index in the more a candidate resource indexes of UE.

Only when the following conditions are met UE just can determine that SPS PDCCH are effective.

1) when the CRC parity check bits of PDCCH payload are scrambled using SPS C-RNTI,

2) when NDI is set to 0.In the case of DCI format 2,2A, 2B and 2C, NDI fields can be directed to possible biography Defeated piece of reference one.

If for setting shown in all fields such as the following table 8 of each DCI and 9, verification can get.

[table 8] is used for the special field of SPS activation

[table 9] is used for the special field of SPS releases

In the case where definitive result shows that SPS PDCCH are verified, UE can consider that SPS swashs based on the DCI information of reception Living or release.

It is acquired except inactive, otherwise for UE, what the DCI format of reception can be considered as receiving with non-matching CRC DCI format.

In the case where DCI format indicating downlink link SPS is activated, the TPC command for PUCCH fields may be used to indicate By one index in four PUCCH resource values of high level setting.

Table 10 shows the PUCCH resource for downlink SPS.

[table 10]

The downlink channel used in LTE system according to the embodiment of the present invention will now be described.

Figure 13 is the exemplary diagram for showing monitoring PDCCH.

For PDCCH monitoring process, referring to 3GPP TS 36.213V10.2.0 (2011-06) the 9th chapter.

UE can perform blind decoding to detect PDCCH.Blind decoding is the PDCCH that desired identifier is masked to reception by solution The CRC of (be referred to as candidate PDCCH) and crc error verification is carried out to identify the control channel that corresponding PDCCH is their own Scheme.Terminal does not know the horizontal CCE polymerizations being used for transmission or DCI format and its PDCCH data quilt in control area The position of transmission.

Multiple PDCCH can be sent in a subframe.UE monitors multiple PDCCH in each subframe.Here, term " prison Survey " refer to that UE attempts to execute blind decoding to PDCCH.

In 3GPP LTE, UE is using search space to reduce the load caused by blind decoding.Search space can be considered as CCE for searching for PDCCH monitors set.UE monitors PDCCH based on search space.

Search space is divided into public search space and the specific search spaces UE.Public search space is that have public affairs for searching for The space of the PDCCH of control information altogether, and (CCE indexes are 0 to 15) is formed by 16 CCE, and support that there is CCE polymerizations The PDCCH of horizontal { 4,8 }.However, carrying UE specific informations PDCCH (DCI format 0 and 1A) in addition can be in public search space Middle transmission.UE supports specific search space the PDCCH with CCE polymerizations horizontal { 1,2,4,8 }.

Under represent by the quantity of the UE PDCCH candidates monitored.

Table 11

The size of search space is determined according to upper table 11, for each in public search space and the specific search spaces UE A starting point for being defined differently than search space.The starting point of public search space is fixed while regardless of any subframe, still The starting point of the specific search spaces UE can be according to UE identifier (for example, C-RNTI), during CCE polywaters are flat and/or radio frame Timeslot number per subframe change.In the case where the starting point of the specific search spaces UE is located in public search space, UE is special Determining search space and public search space may overlap.

It can be limited by the polymerization of the UE PDCCH candidates monitored based on search space.In the case where polymerizeing level 1,2,4 or 8, search Rope spaceIt is defined as the set of PDCCH candidates.With search spaceIn the corresponding CCE of PDCCH candidates m give as follows Go out：

Formula 1

Here, i=0 ... L-1, and in the case where search space is public search space, m '=m.In search space It is specific search space and in the case that multi-carrier indicator field (CIF) is configured as UE, m '=m+M^(L)·n_CI, n_CIIt is to match The value of the CIF set.If CIF is not configured as UE, m '=m.Here, m=0 ..., M^(L)- 1, M^(L)It is given for monitoring The quantity of the PDCCH candidates of search space.

In public search space, for two polymerizations horizontal L=4 and L=8, Y_kIt is set to 0.It is polymerizeing horizontal L's In the specific search spaces UE, variable Y_kAs defined below.

Formula 2

Y_k=(AY_k-1)mod D

Here, Y_-1=n_RNTI≠ 0, A=39827, D=65537,n_sIt is the timeslot number in radio frame.

When wireless device, which is based on C-RNTI, monitors PDCCH, determine that DCI format and search are empty according to PDSCH transmission pattern Between.The following table 12 shows the example of PDCCH of the monitoring configured with C-RNTI.

Table 12

The purposes of DCI format can classify as shown in the table.

Table 13

It can differently determine that the DCI format that will be used and search are empty according to the RNTI for being masked to the CRC for generating DCI Between.The following table 14 indicates the DCI of the control channel in the case where SI-RNTI, P-RNTI or RA-RNTI are masked to the CRC of DCI Format and search space.

Table 14

The following table 15 shows the DCI format of the control channel in the case where SPS-C-RNT is masked to the CRC of DCI and searches Rope space.

Table 15

The following table 16 show the control channel in the case where interim C-RNTI is masked to the CRC of DCI search space and DCI format.

Table 16

Figure 14 shows the example of the downlink subframe of the reference signal being assigned in 3GPP LTE and control channel.

Downlink subframe can be divided into control area and data area.For example, in downlink subframe, control area (or PDCCH region) includes first three OFDM symbol, and the data area for sending PDSCH includes remaining OFDM symbol.

In control area, PCFICH, PHICH and/or PDCCH are sent.

Physics HARQ ACK/NACK indicator channels (PHICH) can be transmitted hybrid automatic repeat-request (HARQ) information and make For the response transmitted to uplink.

The letter of the quantity of the transmittable OFDM symbol for distributing to PDCCH of physical control format indicator channel (PCFICH) Breath.For example, the control format indicator (CFI) of PCFICH may indicate that three OFDM symbols.Except transmission PCFICH and/or PHICH Resource other than region be wireless device monitoring PDCCH PDCCH region.

In subframe, various reference signals also can be transmitted.

Cell specific reference signal reference signal (CRS) is that all wireless devices in cell are receivable with reference to letter Number, transmission can be brought through entire downlink tone.In figure 6, " R0 " indicates to send the RE (resources of the CRS of first antenna port Element), " R1 " is the RE for the CRS for sending the second antenna port, and " R2 " is the RE for the CRS for sending third antenna port, and " R3 " is Send the RE of the CRS of the 4th antenna port.

RS sequences for CRSAs defined below.

Here,It is the maximum quantity of RB, ns is the timeslot number in radio frame, L is the OFDM symbol index in time slot.

Pseudo-random sequence c (i) is as defined below by the gold sequences that length is 31.

C (n)=(x₁(n+N_C)+x₂(n+N_C))mod2

x₁(n+31)=(x₁(n+3)+x₁(n))mod2

x₂(n+31)=(x₂(n+3)+x₂(n+2)+x₂(n+1)+x₂(n))mod2

Here, Nc=1600, the first m-sequence are initialized to x1 (0)=1, x1 (n)=0, m=1,2 ..., 30.Each The second m-sequence of beginning of a OFDM symbol is initialized to It is the Physical Cell Identifier (PCI) of cell, N in the case of normal CP_CP=1, the N in the case where extending CP_CP=0.

In addition, UE specific reference signals (URS) can be sent in subframe.Although CRS is sent in the whole region of subframe, But URS is sent in the data area of subframe, and is the reference signal for demodulating PDSCH.In the figure 7, " R5 " indicates hair Send the RE of URS.DM-RS is the reference signal for demodulating EPDCCH data.

URS can be sent in the RB for being mapped with corresponding PDSCH data.Although in the figure 7, R5, which is indicated on, sends PDSCH Region except, this simply means to the position for the RE for showing that URS is mapped to.

URS can be the reference signal only demodulated by certain wireless devices.RS sequences for URSWith 3 phase of formula Together.At this point,It is the quantity of the RB for corresponding to PDSCH transmission.Passing through single day In the case that line sends URS, it is initialized in the beginning pseudo random sequence generator of each subframen_RNTIIt is the identifier of wireless device.

Above-mentioned initial method is associated with the case where sending URS by individual antenna.When sending URS by multiple antennas, It is initialized in the beginning pseudo random sequence generator of each subframe n_SCIDIt is the parameter obtained from DL related with PDSCH transmission licenses (for example, DCI format 2B or 2C).

URS supports multiple-input, multiple-output (MIMO) to transmit.According to antenna port or layer, the RS sequences for URS can be spread to Following frequency expansion sequence.

Layer	[w(0),w(1),w(2),w(3)]
		1	[+1 +1 +1 +1]
2	[+1 -1 +1 -1]
		3	[+1 +1 +1 +1]
4	[+1 -1 +1 -1]
		5	[+1 +1 -1 -1]
6	[-1 -1 +1 +1]
		7	[+1 -1 -1 +1]
8	[-1 +1 +1 -1]

Layer can be defined as being input to the information path of precoder.Order is the nonzero eigenvalue in mimo channel matrix Quantity, and it is identical as the quantity of layer or spatial flow.Layer can correspond to for distinguishing URS and/or applied to the frequency expansion sequence of URS Antenna port.

In addition, PDCCH is monitored in the restricted area of control area in such as subframe, and sent from entire frequency band CRS is for demodulating PDCCH.As the type of control data becomes diversification and controls the amount increase of data, merely with existing If PDCCH, dispatching flexibility becomes to deteriorate.In addition, in order to reduce the expense caused by CRS transmission, enhancing PDCCH is introduced (EPDCCH)。

Figure 15 shows the illustrative sub-frame with EPDCCH.

Subframe may include zero or PDCCH region 1510 and zero or more regions ePDCCH 1520 and 1530.

The regions EPDCCH 1520 and 1530 are the regions of UE monitoring first phases (epoch).PDCCH region 1510 is located in subframe First three or up at first four OFDM symbol, the regions EPDCCH 1520 and 1530 can be subsequent in PDCCH region 1510 It is neatly dispatched at OFDM symbol.

It can specify one or more regions EPDCCH 1520 and 1530, UE that can monitor the specified regions EPDCCH in UE EPDCCH data in 1520 and 1530.

It base station can be for example, by RRC (radio resource control) message by the quantity/position in the regions EPDCCH 1520 and 1530 Set/size and/or the information of subframe about monitoring EPDCCH informs UE.

In PDCCH region 1510, PDCCH can be demodulated based on CRS.In the regions EPDCCH 1520 and 1530, it can limit Determine demodulation of the DM-RS (rather than CRS) for EPDCCH.DM-RS can be sent out in its corresponding region EPDCCH 1520 and 1530 It send.

RS sequences for DM-RS are identical as shown in formula 3.In this case, It is the maximum quantity of RB.It can be initialized in the beginning pseudo random sequence generator of each subframeNs is the timeslot number in radio frame,It is and corresponding EPDCCH The related cell index in region,It is the parameter provided from high-level signaling.

Each regions EPDCCH 1520 and 1530 can be used for the scheduling of different community.For example, in the regions EPDCCH 1520 EPDCCH can carry the scheduling information of main plot, and the EPDCCH in the regions EPDCCH 1530 can carry the scheduling information of secondary cell.

When the EPDCCH in the regions EPDCCH 1520 and 1530 is sent by mutiple antennas, 1520 He of the regions EPDCCH DM-RS in 1530 can be subjected to precoding identical with EPDCCH.

Compared with using CCE as the PDCCH of its transmission unit, EPDCCH is made using ECCE (enhancing control channel element) For its transmission unit.Polymerization level can be limited as unit of the resource for monitoring EPDCCH.For example, it is assumed that an ECCE is The least resource of EPDCCH can limit the horizontal L=of polymerization { 1,2,4,8,16 }.In addition, in the regions EPDCCH, it can limit search Space.It is candidate that UE can be based on polymerization level monitoring EPDCCH.

Figure 16 is the concept map for showing P cells and S cells.

In figure 16, citing discloses a deployment scenario of P cells and S cells.P cells and S cells can be according to various Mode configures.Each in P cells and S cells may include different centre frequencies.

Referring to Fig.1 6, base station can be executed based on one or more SCC of the PCC and S cells 1620 of P cells 1600 Carrier wave polymerize.When there are 2 or more cells, a cell can be determined as P cells 1600 by base station, and another cell is true It is set to S cells 1620.After the CC polymerizations for the P cells 1600 and S cells 1620 that will be determined, base station can utilize the frequency of polymerization Bandwidth sends the data to UE.The frequency bandwidth that polymerization can also be used in UE sends the data to base station.1600 He of P cells of Figure 15 S cells 1620 are the examples of the arrangement scene of P cells 1600 and S cells 1620, wherein the data transmission range based on PCC is more than Data transmission range based on SCC.

UE can execute radio resource control (RRC) by PCC and connect.In addition, UE can be based on the signal transmitted by PCC Random access base station is attempted by Physical Random Access Channel (PRACH).That is, UE can pass through PCC under carrier aggregation environment It executes and the initial connection establishment or connection reconstruction of base station is handled.

The SCC of S cells 1620 can be used for providing additional radio resources.SCC is aggregated to the carrier wave of PCC gathers to execute It closes, UE needs to execute measurements of neighboring cells to obtain the information about adjacent cell.It base station can be according to the knot of measurements of neighboring cells Fruit determines whether SCC being aggregated to PCC.For example, in P cells, the NCT subframes that will be described can be sent via SCC.Base station PDCCH data can be sent to UE by PCC.PDCCH data may include about will be via downlink PCC bandwidth and SCC The information of the distribution for the PDSCH data that bandwidth is sent and the information for agreeing to the data transmission via uplink.

P cells 1600 and S cells 1620 can execute carrier wave polymerization, and the frequency for passing through polymerization by configuring and activating Bandwidth sends and receives data.

Embodiment of the invention below assumes such system for ease of description,：Based on having polymerize multiple components The frequency band of carrier wave (or cell) executes downlink transmission, and executes uplink transmission based on single component carrier.For example, Assuming that the quantity of downlink CC is two, the quantity of uplink CC is one.Hereinafter, according to the embodiment of the present invention, " CC " means cell.In downlink transmission, base station corresponding with CC can be located at identical or different place.Two downlink chains Road CC can physical cell identifier having the same.User equipment (UE) can by receive downlink control signal (for example, PDCCH), the scheduling information by multiple CC down link datas sent is obtained.UE can be based on the downlink number of reception According to scheduling information receive the PDSCH sent by multiple CC.UE can be by receiving the downlink sent by least one CC Link control signal obtains uplink scheduling information.UE can send PUSCH by the uplink resource dispatched through CC. For example, sending the cell of the scheduling information of PUSCH can be predetermined in the processing of the initial access of UE.For example, UE can be configured as The scheduling information of PUSCH is received from main plot.UE can be based on the physical cell identifier of the cell for the scheduling information for sending PUSCH To generate the reference signal for demodulating PUSCH.

Figure 17 shows that UE receives PDSCH in a subframe from one of multiple CC, and in response to the PDSCH of reception upper The method that ACK/NACK is sent on line link.

UE may be in response to send ACK/NACK from the PDSCH that a CC is sent.UE can be based on having sent PDSCH to UE The physical cell identifier of CC send ACK/NACK.

UE can determine cyclic shift for sending ACK/NACK and sequence (for example, basic sequence, cyclic shift or orthogonal It is superimposed sequence), and it is based on definitive result, ACK/NACK can be sent to base station by UE.UE can be based on the object for the CC for sending PDSCH Cell identifier is managed to determine cyclic shift and sequence for sending ACK/NACK.Only receive PDSCH's from single CC in UE In the case of, even if may specify the CC for having sent PDSCH if as the ACK/NACK that UE transmissions are generated based on physical cell identifier It is corresponding with the ACK/NACK.

Multiple CC send PDSCH to UE in a single sub-frame in order to prevent, and subframe can be configured such that in only multiple CC A schedulable PDSCH.The subframe that multiple CC send PDSCH can be preconfigured at high-rise place.

Referring to Fig.1 7, it is assumed that first community 1710 and second community 1720 are polymerize by carrier wave, only in a subframe One in one cell 1710 and second community 1720 can send PDSCH 1715 and 1725 to UE.First community 1710 and second Cell 172 executes TDM (time division multiplexing), so that first community 1710 sends the first PDSCH 1715 in subframe 0 to 2, the Two cells 1720 send the 2nd PDSCH 1725 in subframe 3 to 5.UE can be from first community 1710 and second community 1720 Each subframe 1750 for receiving PDSCH can be individually arranged at high-rise place.It is not the quilt at high level in the subframe that UE is received In the case of the subframe to send PDSCH from two cells is individually arranged, UE can the physics based on the cell for sending PDSCH it is small Area's identifier is directed to the PDSCH 1715 and 1725 sent from a cell and generates ACK/NACK 1735 and 1745, and UE ACK/NACK can be sent by uplink channel.It can be in subframe 4 for the first ACK/NACK 1735 of the first PDSCH 1715 To being sent in 6, can be sent in subframe 7 to 9 for the 2nd ACK/NACK 1745 of the 2nd PDSCH 1725.

Figure 18 shows that UE receives PDSCH from multiple CC, and is sent by uplink channel in response to the PDSCH of reception The method of ACK/NACK.

In the case where multiple CC send PDSCH simultaneously in a subframe, UE can be directed to and be received by multiple CC as follows PDSCH send ACK/NACK.

UE can be the PDSCH assigned priorities sent, so that UE will be for the ACK/NACK of the PDSCH of higher priority It is sent earlier than other ACK/NACK.For example, the priority in the PDSCH received by the first CC is higher than through the 2nd CC receptions PDSCH priority in the case of, UE can by for the ACK/NACK of the PDSCH received by the first CC earlier than other ACK/ NACK is sent.Hereinafter, according to the embodiment of the present invention, for sending ACK/ in response to the PDSCH received from multiple CC The information of the priority orders of NACK is referred to alternatively as " ACK/NACK transmission priorities information ".

ACK/NACK transmission priorities information can be sent to UE from high level, or can be sent to from base station by dynamic signaling UE.The PDSCH that UE may be in response to receive by the CC with highest ACK/NACK transmission priorities sends ACK/ earlier than other NACK.After sending the PDSCH with highest ACK/NACK transmission priorities, UE may be in response to by having the second high ACK/ The PDSCH that the CC of NACK transmission priorities is received sends ACK/NACK.

In figure 18, for example, it is assumed that first community 1810 and second community 1820 are polymerize by carrier wave, and first community 1810 ACK/NACK transmission priorities are set to the ACK/NACK transmission priorities higher than second community 1820.UE can be first It is directed to from the transmission of first community 1810 with higher ACK/NACK transmission priorities by the first subframe 1830 to send The ACK/NACK of PDSCH.Then, UE can be directed to send from terms of ACK/NACK transmission priorities by the second subframe 1845 And then the ACK/NACK for the PDSCH 1825 that the second community 1820 of first community 1810 is sent.Referring to Fig.1 8, in response to logical First PDSCH 1815 corresponding with the first ACK/NACK transmission priorities for crossing the transmission of subframe 0 to 2, can be sent out by subframe 4 to 6 Send the first ACK/NACK 1830.Next, in response to being sent by subframe 0 to 2 and the 2nd ACK/NACK transmission priorities pair The 2nd PDSCH 1825 answered can send the first ACK/NACK 1845 by subframe 7 to 9.

In other words, UE can send ACK/NACK for priority PDSCH different from each other by different subframes.It is each Cell can determine that UE sends determining for ACK/NACK for the PDSCH transmitted by the cell based on the priority for being assigned to PDSCH When.Each cell can transmit timing based on determining ACK/NACK, pass through son corresponding with determining ACK/NACK transmission timings Frame receives the ACK/NACK sent from UE.

According to the embodiment of the present invention, shared scheduling information is likely difficult between multiple cells.In this case, respectively A cell may be unaware that whether other cells in identical subframe send PDSCH.Therefore, each cell is possibly can not be definite Grasp the transmission timing of its PDSCH in ground.Therefore, the lower cell of ACK/NACK transmission priorities can by attempt with ACK/ ACK/NACK is received in the NACK transmission corresponding subframe of timing or its subsequent subframe, to receive the ACK/NACK for its PDSCH. If there is cell relatively low transmission priority, the cell can be configured as constraining PDSCH scheduling by continuous subframes, so that ACK/NACK processes between cell and UE can be carried out clearly.It can to the PDSCH schedule constraints of relatively low transmission priority cell It is set by high-level signaling.

Figure 19 shows that according to the embodiment of the present invention UE is by multiple CC reception PDSCH and in response to reception The method that PDSCH sends ACK/NACK on uplink.

PDSCH is sent to UE by a subframe in multiple CC and UE is sent by a subframe and is directed to two or more In the case of the ACK/NACK of a PDSCH, UE can carry out following operate.

UE can be sent in a subframe for the ACK/NACK by multiple CC PDSCH received.It is corresponding with each CC Cell should be able to receive the ACK/NACK information about each PDSCH sent from the CC.Embodiment party according to the present invention Formula, can be based on cell identifier (for example, virtual subdistrict identifier) (rather than physical cell identifier corresponding with the CC) come really Determine UE and is directed to resource used in the PDSCH transmissions ACK/NACK received from each in multiple CC.As with each CC pairs The substitution value (for example, virtual subdistrict identifier) of physical cell identifier can be used in the identifier for the cell answered.That is, UE can make With the ACK/NACK transfer resources determined based on virtual subdistrict identifier (instead of physical cell identifier).

Referring to Fig.1 9, for example, UE can send the ACK/ for first community 1910 by the different resource in a subframe NACK and ACK/NACK for second community 1920.First community 1910 can be identified based on the virtual subdistrict of first community 1910 The ACK/NACK 1950 that symbol demodulation is sent from UE, to obtain for the first PDSCH's 1915 sent from first community 1910 ACK/NACK.Second community 1920 can demodulate the ACK/NACK sent from UE based on the virtual subdistrict identifier of second community 1920 1950, to obtain the ACK/NACK for the 2nd PDSCH 1925 sent from second community 1920.

For another example, UE can be generated for the ACK/NACK of first community and small for second based on a virtual subdistrict identifier The ACK/NACK in area, and the ACK/NACK of generation can be sent respectively to first community and second community by UE.First community and Second community can receive the ACK/NACK generated based on virtual subdistrict identifier.First community and second community can be from based on virtual The decoded ACK/NACK payload of cell identifier obtains the ACK/NACK for each cell.It is effective to be included in ACK/NACK The ACK/NACK for each cell in load can be determined in various manners.It will now be described in ACK/NACK payload The method of the ACK/NACK of the middle each cell of positioning.

According to the embodiment of the present invention, UE can determine the ACK/NACK payload for sending ACK/NACK as follows Size.

UE is dispatched for PDSCH by multiple CC, UE may know that the quantity of the estimated ACK/NACK sent of UE.However, In the case that multiple cells corresponding with multiple CC are without the shared information about the PDSCH for dispatching UE, each cell can not be known Road by the UE ACK/NACK sent sum.According to the embodiment of the present invention, UE is according to based on the scheduled ACK/ of transmission mode The size of NACK payload sends ACK/NACK.Therefore, each even if without shared PDSCH scheduling informations between cell Cell will also realize that the size of ACK/NACK payload.

With reference to Figure 20, for example, in the case where first community and second community are polymerize by carrier wave, first community and second Cell can be assumed to be the transmission mode that most two transmission blocks can be transmitted using each cell in the case of FDD.This In the case of, UE can always generate and send the ACK/NACK of four bits, but regardless of what is received from first community and/or second community The quantity of transmission block indicated by PDCCH.The cell for receiving this four ACK/NACK bits can be from this four ACK/NACK ratios Spy extracts its corresponding ACK/NACK information.For example, being NACK in ACK/NACK corresponding with the practical transmission block that do not dispatch Hypothesis under, cell can get with its transmitted by the corresponding ACK/NACK of PDSCH.

The ACK/NACK for being individually assigned to cell can be positioned in ACK/NACK payload.UE can will be directed to and be connect from cell The ack/nack signal of the PDSCH of receipts is included in the specified positions ACK/NACK of the foundation cell in ACK/NACK payload Locate, then ack/nack signal can be transmitted in UE.For example, can have in ACK/NACK relative to the cell index of such as S cell index Ack/nack signal is positioned in effect load.UE can will include in ACK/NACK for the ACK/NACK of the PDSCH sent from P cells To include effective in ACK/NACK for the ACK/NACK of the PDSCH sent from S cells at the first position 2000 of payload At the second position 2050 of load, then ACK/NACK can be transmitted in UE.P cells and S cells can be obtained based on the PUCCH sent from UE Obtain the ACK/NACK information for its corresponding PDSCH.Four ACK/NACK bits shown in Figure 20 are only examples.ACK/NACK The quantity of bit can change according to the quantity of the transmission block sent by multiple cells.

The CSI feedback method of UE according to the embodiment of the present invention will now be described.

UE can be directed to by uplink CC and send CSI feedback by the downlink channel that multiple CC are sent.UE can base The information of CSI feedback is determined in the physical cell identifier for the cell for sending PDSCH, to carry out periodical CSI feedback.CSI Information needed for feedback transmission may include basic sequence, cyclic shift or orthogonal cover sequence.UE can be based on determining CSI feedback Information carry out periodical CSI feedback.In addition, to may be in response to the aperiodicity CSI request from cell anti-to execute CSI by UE Feedback operation.The CSI feedback operation in response to aperiodicity CSI request is described below.

Figure 21 shows that UE receptions include the example to the downlink control signal of the CSI request of one of multiple CC.

The aperiodicity CSI feedback request of one of cell to the polymerization of multiple carrier waves can be sent to UE.In such case Under, UE can be based on the identifier information of the cell of (target) pointed by aperiodicity CSI feedback (for example, Physical Cell Identifier Symbol) generate PUSCH reference signal, and CSI feedback information can be transmitted in UE.When receiving aperiodicity CSI feedback, base station The CSI feedback of reception can be demodulated based on PUSCH reference signal.

With reference to Figure 21, for example, in the case where first community 2110 and second community 2120 are polymerize by carrier wave, first is small Area 2110 can will be sent to UE for the aperiodicity CSI feedback of first community 2110 request 2115.It is directed to first when receiving When the aperiodicity CSI feedback request 2115 of cell 2110, physical cell identifier that UE can be based on first community and aperiodic Property CSI feedback generate PUSCH reference signal 2130, then UE can be sent out PUSCH reference signal 2130 by uplink channel Give first community 2110.The aperiodicity CSI feedback that first community 2110 can will be sent based on the PUSCH reference signal from UE Information 2130 demodulates.

Second community 2120 can will be sent to UE for the aperiodicity CSI feedback of second community 2120 request 2115.When When receiving the aperiodicity CSI feedback request 2115 for first community 2120, UE can be based on the physical area of second community Identifier and aperiodicity CSI feedback generate PUSCH reference signal, and UE can be joined the PUSCH by uplink channel It examines signal and is sent to second community 2120.Second community 2120 can be aperiodic by what is sent from UE based on the PUSCH reference signal Property CSI feedback information 2140 demodulate.

Figure 22 shows that UE receptions include the example to the downlink control signal of the CSI request of multiple CC.

UE can be sent to the aperiodicity CSI feedback request of the cell of multiple carrier waves polymerization.In this case, UE PUSCH reference signal is produced, so that multiple cells respectively can receive aperiodicity CSI feedback information, and UE can should PUSCH reference signal is sent to base station.For example, UE can be based on alternative cell identifier (for example, by the virtual subdistrict of high level configuration Identifier, instead of physical cell identifier) PUSCH reference signal is generated, and the PUSCH reference signal can be sent to base by UE It stands.

With reference to Figure 22, for example, in the case where first community 2210 and second community 2220 are polymerize by carrier wave, first is small Area 2210 can will be sent to UE for the aperiodicity CSI feedback of first community 2220 request 2215.When from first community 2210 When receiving the aperiodicity CSI feedback request 2215 for first community 2210, UE can be based on the non-week for first community The virtual subdistrict identifier of phase property CSI feedback information and first community generates PUSCH reference signal 2250, based on small for second The aperiodicity CSI feedback information in area and the virtual subdistrict identifier of second community generate PUSCH reference signal 2230, and UE PUSCH reference signal 2250 and PUSCH reference signal 2230 can be sent by uplink channel.When passing through uplink channel When receiving signal, first community 2210 can join according to the PUSCH that the virtual subdistrict identifier based on first community 2210 generates Examining signal will decode for the aperiodicity CSI feedback information 2250 of first community 2210.It is received when by uplink channel When to signal, second community 2220 can be believed according to the PUSCH reference that the virtual subdistrict identifier based on second community 2220 generates It number will be decoded for the aperiodicity CSI feedback information 2230 of second community 2220.

For another example, UE can be sent to first community and second community based on the aperiodicity CSI feedback letter for first community Breath and the reference signal that is generated of aperiodicity CSI feedback information and virtual subdistrict identifier for second community, with It is demodulated in the aperiodicity CSI feedback information that will be directed to first community and for the aperiodicity CSI feedback information of second community. First community and second community can be according to the reference signal generated based on virtual subdistrict identifier and small by that will be directed to first The aperiodicity CSI feedback information in area demodulates to obtain for the aperiodicity CSI feedback information of first community and for second The aperiodicity CSI feedback information of cell.

According to the embodiment of the present invention, the operation of base station can be limited to only ask the aperiodicity CSI of a cell, without License while the aperiodicity CSI feedback for being directed to multiple cells.

Shared situation is difficult to by high level configuration and scheduling information sending the cell about the PUSCH information dispatched Under, the request to aperiodicity CSI feedback can be transmitted, the request is included in the downlink for sending PDSCH scheduling informations It controls in signal.It is being included in the downlink control signal for sending PDSCH scheduling informations to the request of aperiodicity CSI feedback In in the case of, UE is executable hereinafter referred to as.

Figure 23 is shown when the downlink control for being included in transmission PDSCH scheduling informations to the request of aperiodicity CSI feedback The operation of UE when in signal processed.

With reference to Figure 23, the downlink control letter for sending PDSCH scheduling informations is included in the request of aperiodicity CSI feedback In the case of in number, the resource 2350,2330 and 2370 that UE is used for sending aperiodicity CSI feedback can be reserved in advance.For example, In the RB that can be used for uplink PUSCH transmission, some 2350,2330 and 2370 can keep for aperiodicity CSI feedback Transmission.Can based on dynamic signaling or high-level signaling by whether using for sending aperiodicity CSI feedback resource and about Information for the reserved resource of aperiodicity CSI feedback transmission is sent to UE.

When first community 2310 and second community 2320 are polymerize by carrier wave, UE can receive to being directed to one of multiple cells Aperiodicity CSI feedback request 2325.In this case, UE can be based on the cell pointed by aperiodicity CSI feedback Physical cell identifier generate PUSCH reference signal, and UE can be by aperiodicity CSI feedback and PUSCH reference signal 2370 are sent to base station.It base station can the CSI feedback information 2370 that will be received by PUSCH of the PUSCH reference signal based on reception Demodulation.

UE can receive to the request 2315 for first community 2310 and the aperiodicity CSI feedback of second community 2320. In this case, it is included in from for the aperiodicity CSI feedback 2350 of first community and being directed in the PUSCH that UE is sent The aperiodicity CSI feedback 2370 of second community should be respectively by the base station of the base station of first community 2310 and second community 2320 It receives.Therefore, UE can be based on the substitution value for distinguishing first community 2310 with 2320 phase of second community by high level configuration (for example, virtual subdistrict identifier, instead of the respective physical cell identifier of first community 2310 and second community 2320) generates PUSCH reference signal, and aperiodicity CSI feedback can be transmitted in UE.

When receiving for the request of the aperiodicity CSI feedback of first community 2310 and second community 2320, UE can base PUSCH ginsengs are generated in the virtual subdistrict identifier of the aperiodicity CSI feedback information and first community for first community 2310 Signal 2350 is examined, the virtual subdistrict identifier life based on the aperiodicity CSI feedback information and second community for second community At PUSCH reference signal 2330, and UE can send PUSCH reference signal 2350 and PUSCH reference by uplink channel Signal 2330.When receiving signal by uplink channel, first community 2310 can be according to based on the virtual of first community The PUSCH reference signal that cell identifier generates will be decoded for the aperiodicity CSI feedback information 2350 of first community 2310. When receiving signal by uplink channel, second community 2320 can be according to the virtual subdistrict identifier based on second community The PUSCH reference signal of generation will be decoded for the aperiodicity CSI feedback information 2330 of second community 2320.

That is, the base station of each cell can obtain the aperiodicity CSI feedback for its cell based on virtual subdistrict identifier Information.

As another method, multiple cells can not be allowed to UE while send the request of aperiodicity CSI feedback.Assuming that more A cell is difficult to shared PDSCH scheduling informations, and the corresponding aperiodicity CSI feedback request of cell may overlap each other.This In the case of, according to the priority orders by high level setting, the aperiodicity CSI feedback request of an only transmittable cell.At this In the case of kind, UE can generate PUSCH reference using the physical cell identifier for the cell for having had requested that aperiodicity CSI feedback Signal, and the PUSCH reference signal can be sent to base station by UE.Base station can be obtained non-based on the PUSCH reference signal of reception Periodical CSI feedback information.

The method that UE controls up-link power according to the power control command sent from multiple CC will now be described.UE can be from Cell receives the scheduling information of PUSCH.UE can be sent out uplink data by being subjected to the uplink channel of power control Give the cell for the scheduling information for having sent PUSCH.Aperiodicity CSI feedback can be sent to aperiodicity CSI feedback institute by UE The cell of direction.

Each cell can receive through the PUCCH ACK/NACK sent and periodicity CSI.It therefore, can be in two cells Each independently execute the power control on PUCCH.UE is transmittable can be by the SRS that each cell receives in order to two small Independent PUCCH power controls in area.UE can control uplink by configuring independent power control circuit in each cell The transmission power of link channel.Specific uplink Poewr control method will now be described.

Figure 24 is the concept map for the Poewr control method for showing UE according to the embodiment of the present invention.

Figure 24 shows PUCCH power control combined methods.

With reference to Figure 24, PDSCH can be sent to UE 2400 by multiple cells 2410 and 2420 simultaneously.In this case, UE 2400 can receive PUCCH power control commands from multiple cells 2410 and 2420.The PUCCH transmission powers carried out by UE 2400 Adjusting can carry out as follows.

The PUCCH transmission powers adjusting of UE can be carried out based on " OR-DOWN-law (rule) (=AND-UP-law) ".It answers With OR-DOWN-law, " up " is indicated in the PUCCH power control commands received respectively from multiple cells 2410 and 2420 by UE In the case of, UE can increase the transmission power of uplink channel.In contrast, when the PUCCH power received from multiple cells When at least one of control command indicates " down ", UE 2400 can reduce the transmission power of uplink channel.This scheme The transmission power of UE 2400 can be effectively reduced.For example, be " UP " in the power control command sent from first community 2410, And in the case that the power control command sent from second community 2420 is " UP ", UE 2400 can increase uplink transmission Power.

Figure 25 shows PUCCH power control combined methods.

With reference to Figure 25, PDSCH can be sent to UE 2500 by multiple cells 2510 and 2520 simultaneously.In this case, UE 2500 can receive the order for PUCCH power controls from multiple cells 2510 and 2520.The PUCCH hairs carried out by UE 2500 Send power regulation that can carry out as follows.

The PUCCH transmission powers adjusting of UE can be carried out based on " OR-UP-law (=AND-DOWN-law) ".By UE points In the case of at least one of PUCCH power control commands not received from multiple cells 2510 and 2520 instruction " up ", UE The transmission power of uplink channel can be increased.In contrast, when the PUCCH power control commands received from multiple cells refer both to When showing " down ", UE 2500 can reduce the transmission power of uplink channel.It can enhance 2510 He of cell using this scheme 2520 PUCCH receptivities.

Figure 26 is the concept map for the Poewr control method for showing UE according to the embodiment of the present invention.

Figure 26 shows PUCCH power control combined methods.

With reference to Figure 26, PDSCH can be sent to UE 2600 by multiple cells 2610 and 2620 simultaneously.In this case, UE 2600 can receive PUCCH power control commands from multiple cells 2610 and 2620.The PUCCH transmission powers carried out by UE 2600 Adjusting can carry out as follows.

UE 2600 can be based only upon from the PUCCH power control commands that multiple cells 2610 and 2620 are sent from one The PUCCH power control commands that a cell 2610 is sent carry out PUCCH power controls.For example, UE2600 can be according to small from master The PUCCH power control commands that area 2610 is sent execute power control to PUCCH.

According to the embodiment of the present invention, UE can not use close-loop power control.UE can come merely with open Loop Power control Transmission power is adjusted, but regardless of the PUCCH power control commands sent from multiple cells.Utilize open loop power control scheme, UE Its output signal can be adjusted by measuring the intensity of the signal sent from base station.

The method of determination according to the embodiment of the present invention from the size of the UE PUCCH formats sent will now be described.

In the case where UE receives PDSCH from multiple cells, UE may know that the ACK/NACK's of transmission in response to PDSCH Quantity.However, in the case of multiple cells not shared scheduling information, each cell can not know the ACK/NACK sent by UE Sum.According to the embodiment of the present invention, UE can utilize scheduled ACK/NACK payload formats by ACK/NACK information It is sent to each cell.For example, UE can be based on sending ACK/ according to the scheduled ACK/NACK payload formats of transmission mode NACK.That is, multiple cells are unable to get the information of the size about the entire ACK/NACK payload sent from UE, cell Can transmission power be set according to the predefined size of ACK/NACK payload, to maintain the decoding performance of cell.It retouches now State the size of PUCCH format.

With channel selection PUCCH format 1b and in the case of PUCCH format 3, FDD system can have such as following formula 5 Middle calculated ACK/NACK payload sizes.

Wherein, n_HARQIt is ACK/NACK payload sizes,It is the quantity of the cell of configuration,It is according to cell The parameter that transmission mode determines.In the case where supporting to send the PDSCH of two transmission blocks,It is supporting to send one In the case of the PDSCH of a transmission block,

It can map with PUCCH for the ack/nack signal of down link data, then can be sent.It sends and is directed to downlink The PUCCH format of the ack/nack signal of link data includes PUCCH format 1a/1b.PUCCH format 1b with channel selection The ack/nack signal of two to four bits can be sent to base station.PUCCH format 1b with channel selection can be based on channel and select It selects table and assigns the ACK/NACK for being directed to down link data.As shown in upper table 6, Channel selection table can be by ack/nack signal and use It is mapped in the PUCCH resource and symbol of transmission.Channel selection table is contemplated that the bit number (M) for sending ack/nack signal It is configured by the combination of multiple resource indexes and the modulation symbol of ack/nack signal.Signal transmission can be distributed by channel selection The resource of required most four bits.For the ack/nack signal of four bits or less bit, the table is according to transmission ACK/ Bit number (M) needed for NACK signal configures, and the table can be used for the distribution of ACK/NACK resources.It can be believed by high level It enables and channel selection sheet format is pre-transmitted to UE and base station.

With channel selection PUCCH format 1b and PUCCH format 3 and DL-UL with setting to 0 in the case of, TDD system There can be the ACK/NACK payload sizes as calculated in following formula 6.

Here,It can be the parameter determined according to the transmission mode of serving cell.It is supporting to send two transmission blocks PDSCH in the case of,In the case where supporting to send the PDSCH of a transmission block,

K can indicate the downlink group determined according to uplink/downlink configuration and subframe index n in TDD system Intersection is closed, as shown in table 18 below.Downlink composite set K may include about in specific uplink/downlink configuration The information of downlink subframe corresponding with the ACK/NACK sent by the subframe with subframe index n.

[table 18]

M includes about the downlink combination being included according to uplink/downlink configuration and subframe index n determinations The information of the quantity of element in set K, k can be the elements of downlink composite set K.

n_HARQCan be ACK/NACK payload sizes,It is the quantity of serving cell,It is to be passed according to cell The parameter that defeated pattern determines.In the case where serving cell supports two transmission blocks,It is two, in one transmission block of support In the case of,Can be one.

With channel selection M=2 PUCCH format 1b and PUCCH format 3 and DL-UL configure 1-6 in the case of, TDD system can have the ACK/NACK payload sizes as calculated in following formula 7.

K can indicate the downlink group determined according to uplink/downlink configuration and subframe index n in TDD system Intersection is closed, as shown in upper table 18.Downlink composite set K may include about in specific uplink/downlink configuration The information of downlink subframe corresponding with the ACK/NACK sent by the subframe with subframe index n.

n_HARQCan be ACK/NACK payload sizes,It is the quantity of serving cell.

Can be the DAI values indicated by the downlink control channel in serving cell c, U_DAI,cIt is that UE is practical to connect The quantity for the up to downlink component carrier of the subframe n-k of serving cell c received,It is the transmission according to serving cell The parameter that pattern determines, wherein in the case where supporting to send the PDSCH of two transmission blocks,It is supporting to send one In the case of the PDSCH of a transmission block,

The method that UE according to the embodiment of the present invention sends SRS will now be described.

UE can be directed to multiple cells and SRS is respectively configured to receive transmission aperiodicity CSI feedback from multiple cells The PUCCH of PUSCH and transmission ACK/NACK and/or periodical CSI feedback.UE can be directed to object of each cell based on cell It manages cell identifier and generates SRS, and the SRS is sent to cell.To generate the letter that SRS is determined based on physical cell identifier Breath may include the information (for example) about basic sequence, cyclic shift, combination of frequency or SRS subframe.

The SRS generated based on the information for sending SRS can be sent to base station by UE.For two cells will to be sent to In the case that the uplink resource of the UE of SRS overlaps each other, the SRS of the transmittable cells with higher priority of UE, without Send the SRS of the cell with lower priority.

In the case where UE is allowed to send SRS and ACK/NACK simultaneously, PUCCH format 1a/1b that can be based on shortening or The PUCCH format 3 of shortening sends ACK/NACK.One in two cells is main plot, the other is the feelings of secondary cell Under condition, the PUCCH format 3 of PUCCH format 1a/1b and shortening that secondary cell and main plot can be based on shortenings send ACK/ NACK。

Another embodiment according to the present invention, UE is using the alternative cell identifier by high level configuration (for example, virtual Cell identifier, instead of physical cell identifier) SRS is generated and sent, so that multiple cells can receive SRS simultaneously.

According to the embodiment of the present invention, the cell for receiving PUCCH may differ from receiving the cell of PUSCH.If UE does not have Having and is transmitted while being configured PUCCH/PUSCH, then UE can only carry out PUCCH transmission, and without PUSCH transmission.UE can root PUSCH or PUCCH is selected according to the header length sent by PUCCH.For example, being in the information sent by PUCCH In the case of ACK/NACK, PUCCH rather than PUSCH can be transmitted in UE.For another example, if being periodically by the PUCCH information sent CSI, then UE can be transmitted PUSCH rather than PUCCH.

Include processor 2710, memory 2720 and RF units 2730 with reference to Figure 27, BS 2700.Memory 2720 connects To processor 2710 and it is configured as storing the various information of the operation for processor 2710.RF units 2730 connect everywhere It manages device 2710 and is configured as sending and/or receiving radio signal.Processor 2710 realizes proposed function, processing And/or method.In described embodiment, the operation of BS can be realized by processor 2710.

For example, processor 2710 can determine whether to retransmit data based on the ACK/NACK information sent from UE.Processor 2710 can identify the ACK/NACK information about the data sent from base station in ACK/NACK payload, and based on mark ACK/NACK information, processor 2710 can be determined whether executing data retransmission.

User equipment 2750 includes processor 2760, memory 2770 and RF units 2780.Memory 2770 connects everywhere Reason device 2760 and the various information for being configured as operation of the storage for processor 2760.RF units 2780 are connected to processor 2760 and be configured as send and/or receive radio signal.Processor 2760 realize proposed function, processing and/or Method.In described embodiment, the operation of user equipment can be realized by processor 2760.

For example, processor 2760 may be implemented such that UE can be according to the transmission mode and second service of first service cell The transmission mode of cell determines the size of ACK/NACK payload, is arranged based on determining ACK/NACK payload sizes and is used In the transmission power of transmission ACK/NACK payload, and the ACK/ is sent by PUCCH based on the transmission power of setting NACK payload.

The processor may include application-specific integrated circuit (ASIC), other chipsets, logic circuit and/or data processing Device.The memory may include read-only memory (ROM), random access memory (RAM), flash memory, storage card, storage medium And/or other storage devices.The RF units may include the baseband circuit for handling radio signal.Work as the above embodiment When implemented in software, said program can be realized using the module (process or function) for executing above-mentioned function.The module can quilt Storage executes in memory and by processor.Memory can be set to the internal or external of processor and utilize various ripe Know that means are connected to processor.

In above-mentioned example sexual system, although describing method, this hair using series of steps or box based on flow chart Bright to be not limited to such sequence of steps, some steps can be executed according to the sequence different from remaining step, or can be with remaining Step is performed simultaneously.In addition, it will be understood by those skilled in the art that step shown in the flowchart not exclusively, in not shadow In the case of ringing the scope of the present invention, it may include other steps or one or more steps of flow chart can be deleted.

Claims

1. a kind of method for uplink transmission, this approach includes the following steps：

By user equipment (UE) physical down link sharing channel PDSCH is received from first service cell and second service cell；

If ack/nack ACK/NACK corresponding with PDSCH receptions will be sent by a subframe, by the UE Include institute according to the determination of the second transmission mode of the first transmission mode of the first service cell and the second service cell State the size of the ACK/NACK payload of ACK/NACK；

It is configured to send the ACK/NACK payload by sizes of the UE based on the ACK/NACK payload Transmission power；And

It is sent by physical uplink control channel PUCCH in one subframe based on the transmission power by the UE The ACK/NACK payload,

Wherein, if each in first transmission mode and second transmission mode is configured as supporting two transmission Block and only one transmission block is received from a cell in the first service cell and the second service cell, then root Two transmission blocks that two transmission blocks supported according to first transmission mode and second transmission mode are supported are to determine State the size of ACK/NACK payload.

2. according to the method described in claim 1,

Wherein, as the UE using Frequency Division Duplex FDD as duplexing schemes and the PUCCH it is PUCCH format 3 or with letter When the PUCCH format 1b of road selection, the size of the ACK/NACK payload is determined based on following formula,

Wherein, n_HARQIt is the size of the ACK/NACK payload,It is the quantity of serving cell,It is according to cell Transmission mode determine parameter, wherein when the serving cell support two transmission blocks when,It is 2, and

Wherein, when the serving cell supports a transmission block,It is 1.

3. according to the method described in claim 1,

Wherein, as the UE using Time Division Duplex TDD as duplexing schemes and the PUCCH it is PUCCH format 3 or with letter When road selects the PUCCH format 1b of M=1, the size of the ACK/NACK payload is determined based on following formula,

Wherein, n_HARQIt is the size of the ACK/NACK payload,It is the quantity of serving cell,It is according to cell Transmission mode determine parameter,

Wherein, when the serving cell supports two transmission blocks,It is 2,

Wherein, when the serving cell supports a transmission block,It is 1,

Wherein, K is the downlink according to uplink/downlink configuration and subframe index n determinations in the TDD based on following table Link combinations set,

Wherein, k is included in the element in the downlink composite set, and

Wherein, M is the information about the quantity for the element being included in the downlink composite set,

[table]

4. according to the method described in claim 1,

Wherein, the first service cell and the second service cell are polymerize by carrier wave, wherein the second service cell It is activated by the first service cell, and

Wherein, the first service cell and the second service cell physical cell identifier having the same.

5. the user equipment (UE) in a kind of wireless communication system, the UE include：

Radio frequency unit, the RF units are configured as receiving radio signal；And

Processor, the processor are operationally connected and configured to the RF units：

Physical down link sharing channel PDSCH is received from first service cell and second service cell；

If ack/nack ACK/NACK corresponding with PDSCH receptions will be sent by a subframe, according to The determination of second transmission mode of the first transmission mode of first service cell and the second service cell includes the ACK/ The size of the ACK/NACK payload of NACK；

Size based on the ACK/NACK payload is configured to send the transmission power of the ACK/NACK payload； And

The ACK/ is sent by physical uplink control channel PUCCH in one subframe based on the transmission power NACK payload,

6. UE according to claim 5,

Wherein, when the serving cell supports two transmission blocks,It is 2, and

Wherein, when the serving cell supports a transmission block,It is 1.

7. UE according to claim 5,

Wherein, when the serving cell supports two transmission blocks,It is 2,

Wherein, when the serving cell supports a transmission block,It is 1,

Wherein, k is included in the element in the downlink composite set, and

[table]

8. UE according to claim 5,